Touch display device

ABSTRACT

A display device with a touch panel includes a display panel, and an electrostatic-capacitance-coupling touch panel which is arranged on a viewer-side surface of the display panel. The touch panel includes a substrate; a first shield conductor which is formed on the viewer-side surface of the substrate; an insulation film which is formed on the first shield conductor; a plurality of first electrodes which are formed on the insulation film, extend in the first direction and are arranged parallel to each other in the second direction which intersects with the first direction; and a plurality of second electrodes which are formed on the insulation film, extend in the second direction and are arranged parallel to each other in the first direction which intersects with the second direction. A predetermined signal is inputted to the first shield conductor.

CLAIM OF PRIORITY

The present application claims priority from Japanese application serialNo. 2009-9412, filed on Jan. 20, 2009, the content of which is herebyincorporated by reference into this application.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a touch panel (touch sensor), and moreparticularly to a display device with anelectrostatic-capacitance-coupling touch panel (capacitive sensor).

2. Description of the Related Art

As touch panel techniques which are mainly used, there have been known atechnique which detects a change of light, and a technique which detectsa change of an electric characteristic. Further, as the technique whichdetects a change of an electric characteristic, an electrostaticcapacitance coupling technique has been known (see JP-A-2008-65748(patent document 1) and JP-A-2007-175050 (patent document 2)).

FIG. 16 to FIG. 18 are views which show a conventional touch panel whichadopts an electrostatic capacitance coupling technique, wherein FIG. 16is a plan view showing an electrode pattern, FIG. 17 is across-sectional view showing the cross-sectional structure of theelectrode pattern taken along a line F-F′ in FIG. 16, and FIG. 18 is across-sectional view showing the cross-sectional structure of theelectrode pattern taken along a line G-G′ in FIG. 16.

The conventional touch panel which adopts the electrostatic capacitancecoupling technique, as shown in FIG. 16 to FIG. 18, includes a pluralityof electrodes 1X which extend in the first direction (for example, Xdirection) and are arranged parallel to each other in the seconddirection (for example, Y direction) which intersects with the firstdirection, and a plurality of electrodes 2Y which extend in the seconddirection while intersecting with the electrodes 1X and are arrangedparallel to each other in the first direction. The plurality ofelectrodes 2Y are arranged on a substrate 11, and are covered with aninsulation film 12 formed on the electrodes 2Y. The plurality ofelectrodes 1X are arranged on an insulation film 12, and are coveredwith an insulation film 13 formed over the plurality of electrodes 1X.The electrodes 1X and the electrodes 2Y are made of a transparentconductive material such as ITO (Indium Tin oxide), for example.

Further, the conventional touch panel which adopts an electrostaticcapacitance coupling technique includes, as shown in FIG. 17 and FIG.18, a planar shield conductor 15 on a surface of the substrate 11 on aside opposite to a viewer's side. A predetermined signal is inputted tothe shield conductor 15 thus reducing the noises transmitted to thetouch panel from the display panel. The shield conductor 15 is formed ofa transparent conductive film made of ITO or the like, for example.

SUMMARY OF THE INVENTION

In the conventional touch panel which adopts an electrostaticcapacitance coupling technique, as shown in FIG. 16 to FIG. 18, aplurality of electrodes 1X and a plurality of electrodes 2Y are formedon conductive layers (lower layer and upper layer) different from eachother respectively by way of the insulation film 12. In such electrodestructure, with respect to the insulation film 12 and a protective film13 which is formed on the electrode 1X, strain is generated in thesefilms due to the electrodes 1X formed on the insulation film 12.Further, with respect to a reflection light, the lower layer and theupper layer have the different optical path lengths and hence, the colordifference occurs between the electrodes 1X which are formed on thelower layer and the electrodes 2Y which are formed on the upper layerthus making electrode patterns of the electrodes 1X and the electrodes2Y appear conspicuously. Such conspicuous appearance of the electrodepatterns brings about worsening of optical characteristics leading tolowering of characteristics of a display device which incorporates atouch panel therein. Accordingly, it is necessary to take acountermeasure to cope with such a drawback.

Further, in the conventional touch panel which adopts an electrostaticcapacitance coupling technique, as shown in FIG. 17 and FIG. 18, ashield conductor 15 is formed on a surface (back surface) of thesubstrate 11 opposite to a viewer-side surface (main surface). In suchstructure, as transparent conductive material layers, it is necessary toprovide three transparent conductive material layers consisting of thetransparent conductive material layer for forming the electrode 1X, thetransparent conductive material layer for forming the electrode 2Y and,further, the transparent conductive material layer for forming theshield conductor 15. This structure becomes a factor which impedes thereduction of cost.

Inventors of the present invention have made the present invention byfocusing on these three transparent conductive material layersconsisting of the electrodes 1X, the electrodes 2Y and the shieldconductor 15.

It is an object of the present invention to provide a technique whichcan realize the suppression of lowering of characteristics and thereduction of cost in a display device with a touch panel.

The above-mentioned and other objects and novel technical features ofthe present invention will become apparent from the description of thisspecification and attached drawings.

(1) According to one aspect of the present invention, there is provideda display device with a touch panel which includes: a display panel; andan electrostatic-capacitance-coupling touch panel which is arranged on aviewer-side surface of the display panel, wherein the touch panelincludes: a substrate; a first shield conductor which is formed on theviewer-side surface of the substrate; an insulation film which is formedon the first shield conductor; a plurality of first electrodes which areformed on the insulation film, extend in the first direction and arearranged parallel to each other in the second direction which intersectswith the first direction; and a plurality of second electrodes which areformed on the insulation film, extend in the second direction and arearranged parallel to each other in the first direction which intersectswith the second direction, wherein a predetermined signal is inputted tothe first shield conductor, each one of the plurality of firstelectrodes includes a first portion which is formed on the viewer-sidesurface of the substrate and the second portion which is formed in aseparated manner from the second electrode on the insulation film, thefirst portion is connected to the second portion via a contact holeformed in the insulation film, the first shield conductor has aplurality of opening portions, the plurality of opening portions includefirst opening portions in which the first portions are formed inopenings and second opening portions in which the first portions are notformed in the openings, and the first portions are formed in the firstopening portions.

(2) In the display device with a touch panel having the above-mentionedconstitution (1), the first shield conductor has a meshed shapeconstituted of first members and second members which intersect witheach other, and the first opening portions and the second openingportions are respectively opening portions which are formed by the firstmembers and the second members which constitute the meshed shape.

(3) In the display device with a touch panel having the above-mentionedconstitution (2), the second electrode has first portions whichintersect with the first portions of the first electrode in plane andsecond portions which are contiguously formed with the first portions,the second portion of the first electrode has a planar square shape inwhich a width of the second portion of the first electrode is largerthan a width of the first portion of the first electrode, the secondportion of the second electrode has a planar square shape in which awidth of the second portion of the second electrode is larger than awidth of the first portion of the second electrode, the second portionof the first electrode and the second portion of the second electrodeare arranged in a state where a side of the second portion of the firstelectrode and a side of the second portion of the second electrode whichface each other in an opposed manner make an acute angle with respect tothe first direction, and the first member and the second member of thefirst shield conductor which constitute the meshed shape are formedalong the side of the second portion of the first electrode and alongthe side of the second portion of the second electrode which face eachother in an opposed manner.

(4) In the display device with a touch panel having the above-mentionedconstitution (3), at least one of the first members and at least one ofthe second members of the first shield conductor which constitute themeshed shape are arranged between the first portions of two firstelectrodes arranged adjacent to each other.

(5) In the display device with a touch panel having the above-mentionedconstitution (1), the display device further includes a plurality oflines which are formed around a region where the plurality of firstelectrodes and the plurality of second electrodes are formed, and areelectrically connected to the plurality of first electrodes or theplurality of second electrodes respectively, the plurality of lines areformed on the viewer-side surface of the substrate, and the displaydevice further includes a second shield conductor which is formed on theinsulation film so as to cover the plurality of lines, and to which apredetermined signal is inputted.

(6) In the display device with a touch panel having any one of theabove-mentioned constitutions (1) to (5), the touch panel furtherincludes a protective film which is formed on the plurality of firstelectrodes and the plurality of second electrodes.

(7) In the display device with a touch panel having the above-mentionedconstitution (6), the touch panel has a front panel formed on theprotective film.

(8) According to another aspect of the present invention, there isprovided a display device with a touch panel which includes: a displaypanel; and an electrostatic-capacitance-coupling touch panel which isarranged on a viewer-side surface of the display panel, wherein thetouch panel includes: a substrate; a plurality of first electrodes whichare formed on a display-panel-side surface of the substrate, extend inthe first direction and are arranged parallel to each other in thesecond direction which intersects with the first direction; a pluralityof second electrodes which are formed on the display-panel-side surfaceof the substrate, extend in the second direction and are arrangedparallel to each other in the first direction which intersects with thesecond direction; an insulation film which is formed on the plurality offirst electrodes and the plurality of second electrodes; and a shieldconductor which is formed on the insulation film; wherein apredetermined signal is inputted to the shield conductor, each one ofthe plurality of first electrodes includes a first portion which isformed on the insulation film and the second portion which is formed ina separated manner from the second electrode on the display-panel-sidesurface of the substrate, the first portion is connected to the secondportion via a contact hole formed in the insulation film, the shieldconductor has a plurality of opening portions, the plurality of openingportions include first opening portions in which the first portions areformed in openings and second opening portions in which the firstportions are not formed in the openings, and the first portions areformed in the first opening portions.

(9) In the display device with a touch panel having the above-mentionedconstitution (8), the shield conductor has a meshed shape constituted offirst members and second members which intersect with each other, andthe first opening portions and the second opening portions arerespectively opening portions which are formed by the first members andthe second members which constitute the meshed shape.

(10) In the display device with a touch panel having the above-mentionedconstitution (9), the second electrode has first portions whichintersect with the first portions of the first electrode in plane andsecond portions which are contiguously formed with the first portions,the second portion of the first electrode has a planar square shape inwhich a width of the second portion of the first electrode is largerthan a width of the first portion of the first electrode, the secondportion of the second electrode has a planar square shape in which awidth of the second portion of the second electrode is larger than awidth of the first portion of the second electrode, the second portionof the first electrode and the second portion of the second electrodeare arranged in a state where a side of the second portion of the firstelectrode and a side of the second portion of the second electrode whichface each other in an opposed manner make an acute angle with respect tothe first direction, and the first member and the second member of theshield conductor which constitute the meshed shape are formed along theside of the second portion of the first electrode and along the side ofthe second portion of the second electrode which face each other in anopposed manner.

(11) In the display device with a touch panel having the above-mentionedconstitution (10), at least one of the first members and at least one ofthe second members of the shield conductor are arranged between thefirst portions of two first electrodes arranged adjacent to each other.

(12) In the display device with a touch panel having the above-mentionedconstitution (8), the display device further includes a plurality oflines which are formed around a region where the plurality of firstelectrodes and the plurality of second electrodes are formed, and areelectrically connected to the plurality of first electrodes or theplurality of second electrodes respectively, the plurality of lines areformed on the display-panel-side surface of the substrate, and theshield conductor is formed so as to cover the plurality of lines.

(13) In the display device with a touch panel having any one of theabove-mentioned constitutions (8) to (12), the touch panel furtherincludes a protective film which is formed on the plurality of firstelectrodes and the plurality of second electrodes.

(14) In the display device with a touch panel having any one of theabove-mentioned constitutions (1) to (13), the plurality of firstelectrodes and the plurality of second electrodes are formed of atransparent conductive film.

To briefly explain advantageous effects obtained by typical inventionsamong the inventions described in this specification, they are asfollows.

According to the present inventions, it is possible to realize thesuppression of lowering of characteristics and the reduction of cost ina display device with a touch panel.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view showing an electrode pattern of a touch panelwhich is incorporated into a display device with a touch panel accordingto an embodiment 1 of the present invention;

FIG. 2 is a plan view showing a portion of the electrode pattern shownin FIG. 1 in an enlarged manner;

FIG. 3A and FIG. 3B are views showing the cross-sectional structure ofthe touch panel shown in FIG. 1, wherein FIG. 3A is a cross-sectionalview taken along a line A-A′ in FIG. 1, and FIG. 3B is a cross-sectionalview showing a portion of the touch panel shown in FIG. 3A in anenlarged manner;

FIG. 4A and FIG. 4B are views showing the cross-sectional structure ofthe touch panel shown in FIG. 1, wherein FIG. 4A is a cross-sectionalview taken along a line B-B′ in FIG. 1, and FIG. 4B is a cross-sectionalview showing a portion of the touch panel shown in FIG. 4A in anenlarged manner;

FIG. 5 is a plan view showing a shield conductor pattern in the touchpanel shown in FIG. 1;

FIG. 6 is a block diagram showing the schematic constitution of thedisplay device with a touch panel according to the embodiment 1 of thepresent invention;

FIG. 7 is a cross-sectional view showing the cross-sectional structureof a touch panel according to a modification of the embodiment 1 of thepresent invention;

FIG. 8 is a plan view showing an electrode pattern of a touch panelwhich is incorporated into a display device with a touch panel accordingto an embodiment 2 of the present invention;

FIG. 9 is a plan view showing a portion of the display device with atouch panel shown in FIG. 8 in an enlarged manner;

FIG. 10A and FIG. 10B are views showing the cross-sectional structure ofthe touch panel shown in FIG. 8, wherein FIG. 10A is a cross-sectionalview taken along a line D-D′ in FIG. 8, and FIG. 10B is across-sectional view showing a portion of the touch panel shown in FIG.10A in an enlarged manner;

FIG. 11A and FIG. 11B are views showing the cross-sectional structure ofthe touch panel shown in FIG. 8, wherein FIG. 11A is a cross-sectionalview taken along a line E-E′ in FIG. 8, and FIG. 11B is across-sectional view showing a portion of the touch panel shown in FIG.11A in an enlarged manner;

FIG. 12 is a block diagram showing the schematic constitution of thedisplay device with a touch panel according to the embodiment 2 of thepresent invention;

FIG. 13 is a plan view showing an electrode pattern of a touch panelwhich is incorporated into a display device with a touch panel accordingto an embodiment 3 of the present invention;

FIG. 14 is a plan view showing a shield conductor pattern in the touchpanel shown in FIG. 13;

FIG. 15 is a plan view showing a shield conductor pattern of a touchpanel which is incorporated into a display device with a touch panelaccording to an embodiment 4 of the present invention;

FIG. 16 is a plan view of an electrode pattern of a conventionalelectrostatic capacitance-coupling touch panel;

FIG. 17 is a cross-sectional view showing the cross-sectional structuretaken along the line F-F′ in FIG. 16; and

FIG. 18 is a cross-sectional view showing the cross-sectional structuretaken along the line G-G′ in FIG. 16.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Hereinafter, embodiments of the present invention are explained indetail in conjunction with drawings. Here, in all drawings forexplaining the embodiments of the present invention, parts havingidentical functions are given same symbols, and their repeatedexplanation is omitted.

Embodiment 1

In this embodiment 1, the explanation is made with respect to a case inwhich the present invention is applied to, for example, a display devicewith a touch panel which mounts a touch panel on a liquid crystaldisplay panel as one example of a display panel.

FIG. 1 to FIG. 6 are views according to the display device with a touchpanel of an embodiment 1 of the present invention. That is, FIG. 1 is aplan view showing an electrode pattern of a touch panel which isincorporated into the display device with a touch panel, FIG. 2 is aplan view showing a portion of the electrode pattern shown in FIG. 1 inan enlarged manner, FIG. 3A and FIG. 3B are views showing thecross-sectional structure of the touch panel shown in FIG. 1, whereinFIG. 3A is a cross-sectional view taken along a line A-A′ in FIG. 1, andFIG. 3B is a cross-sectional view showing a portion of the touch panelshown in FIG. 3A in an enlarged manner, FIG. 4A and FIG. 4B are viewsshowing the cross-sectional structure of the touch panel shown in FIG.1, wherein FIG. 4A is a cross-sectional view taken along a line B-B′ inFIG. 1, and FIG. 4B is a cross-sectional view showing a portion of thetouch panel shown in FIG. 4A in an enlarged manner, FIG. 5 is a planview showing a shield conductor pattern in the touch panel shown in FIG.1, and FIG. 6 is a block diagram showing the schematic constitution ofthe display device with a touch panel.

FIG. 6 shows the cross-sectional structure of the touch panel 20 takenalong a line C-C′ in FIG. 1.

The display device with a touch panel of this embodiment 1 includes, asshown in FIG. 6, a liquid crystal display panel 30, anelectrostatic-capacitance-coupling touch panel 20 which is arranged on aviewer-side surface of the liquid crystal display panel 30, and abacklight 40 which is arranged below a surface of the liquid crystaldisplay panel 30 on a side opposite to the viewer's side. As the liquidcrystal display panel 30, an IPS type liquid crystal display panel, a TNtype liquid crystal display panel, a VA type liquid crystal displaypanel or the like may be used, for example. The liquid crystal displaypanel 30 includes a display region where a plurality of pixels arearranged in a matrix array, and a non-display region which is arrangedaround the display region. Each of the plurality of pixels includes apixel electrode and a counter electrode. A light blocking film such as ablack matrix is formed in the non-display region.

The touch panel 20 includes, as shown in FIG. 1 to FIG. 4, a pluralityof electrodes 1X which respectively extend in the first direction (forexample, X direction) and are arranged parallel to each other in thesecond direction (for example, Y direction) which intersects with thefirst direction at predetermined pitches on a viewer-side surface of asubstrate 11, and a plurality of electrodes 2Y which respectively extendin the second direction by intersecting with the plurality of electrodes1X and are arranged parallel to each other in the first direction atpredetermined pitches on the viewer-side surface of a substrate.

Each one of the plurality of electrodes 2Y is formed in an electrodepattern where a plurality of first portions 2 a and a plurality ofsecond portions 2 b each having a width larger than a width of the firstportion 2 a are alternately arranged in the second direction. Theplurality of respective electrodes 2Y are arranged on the viewer-sidesurface of the substrate 11 by way of an insulation film 12, and arecovered with a protective film 13 formed over the electrodes 2Y. As thesubstrate 11, a transparent insulation substrate made of glass or thelike is used, for example.

Each one of the plurality of electrodes 1X is formed in an electrodepattern where a plurality of first portions 1 a and a plurality ofsecond portions 1 b each having a width larger than a width of the firstportion 1 a are alternately arranged in the first direction. The firstportion 1 a of each one of the plurality of electrodes 1X is formed on aconductive layer different from a conductive layer on which theelectrodes 2Y are formed, and intersects with the first portion 2 a ofthe electrodes 2Y in plane. The second portion 1 b of each one of theplurality of electrodes 1X is formed in a separated manner from theelectrode 2Y and on the same conductive layer as the electrode 2Y. Inthis embodiment 1, the first portion 1 a of the electrode 1X is formedbelow the electrode 2Y as viewed from a substrate 11 side.

The second portions 1 b of plurality of respective electrodes 1X are, inthe same manner as the electrode 2Y, arranged on the viewer-side surfaceof the substrate 11 by way of the insulation film 12, and the secondportions 1 b are covered with the protective film 13 formed on thesecond portions 1 b. The first portions 1 a of the plurality ofrespective electrodes 1X are arranged on the viewer-side surface of thesubstrate 11 and are covered with the insulation film 12 formed on thefirst portions 1 a.

The first portion 1 a of the electrode 1X intersects with the firstportion 2 a of the electrode 2Y in plane. The first portion 1 a of theelectrode 1X is electrically and mechanically connected to two secondportions 1 b arranged adjacent to each other with the first portion 2 asandwiched therebetween via a contact hole 12 a formed in the insulationfilm 12 which constitutes an interlayer insulation film between thefirst portion a of the electrode 1X and the electrode 2Y.

That is, each one of the plurality of electrodes 1X includes the firstportions 1 a which are formed on the conductive layer different from theconductive layer for forming the electrode 2Y and intersect with theelectrode 2Y, and the second portions 1 b which are formed in aseparated manner from the electrode 2Y and are formed on the sameconductive layer as the electrode 2Y. The first portion 1 a of theelectrode 1X is electrically connected to the second portion 1 b of theelectrode 1X via the contact hole 12 a formed in the insulation film 12between the first portion 1 a and the electrode 2Y.

The second portion 2 b of the electrode 2Y is arranged between the firstportions 1 a of two electrodes 1X arranged adjacent to each other asviewed in a plan view. The second portion 1 b of the electrode 1X isarranged between the first portions 2 a of two electrodes 2Y arrangedadjacent to each other as viewed in a plan view.

That is, the electrode 2Y includes the portion 2 b having a width largerthan a width of the portion 2 a where the electrode 2Y intersects withthe electrode 1X between the electrodes 1X, and the electrode 1Xincludes the portion 1 b having a width larger than a width of theportion 1 a where the electrode 1X intersects with the electrode 2Ybetween the electrodes 2Y.

The touch panel 20 includes, as viewed in a plan view, a center regionwhere the plurality of electrodes 2Y and the plurality of electrodes 1Xare arranged, and a peripheral region which is arranged around thecenter region. On a peripheral region of the touch panel 20, as shown inFIG. 1, a plurality of lines 5 which are electrically connected to theplurality of electrodes 2Y respectively and a plurality of lines 5 whichare electrically connected to the plurality of electrodes 1Xrespectively are arranged. The plurality of these lines 5 are lineswhich electrically connect the plurality of respective electrodes 2Y andthe plurality of respective electrodes 1X with a touch position controlcircuit.

The center region of the touch panel 20 is arranged corresponding to thedisplay region of the liquid crystal display panel 30, and theperipheral region of the touch panel 20 is arranged corresponding to thenon-display region of the liquid crystal display panel 30. That is, theplurality of electrodes 1X and the plurality of electrodes 2Y of thetouch panel 20 are arranged in the region which faces the display regionof the liquid crystal display panel 30 in an opposed manner, and theplurality of lines 5 are arranged in the region which faces thenon-display region of the liquid crystal display panel 30 in an opposedmanner.

As shown in FIG. 3 and FIG. 4, the plurality of respective lines 5 arearranged on the viewer-side surface (main surface) of the substrate 11,and the plurality of lines 5 are covered with the insulation film 12formed over the lines 5. As shown in FIG. 3 and FIG. 4, the plurality ofrespective lines 5 are electrically connected to the correspondingelectrodes (electrodes 1X, electrodes 2Y) via the contact holes 12 bformed in the insulation film 12 at terminal end portions of therespective electrodes (electrodes 1X, electrodes 2X).

The plurality of respective electrodes 1X and the plurality ofrespective electrodes 2Y are formed using a material which exhibits hightransmissivity, for example, a transparent conductive material such asITO (Indium Tin Oxide). Each one of the plurality of lines 5 adopts thetwo-layered structure where respective layers are made of differentconductive materials, for example. For example, each electrode adoptsthe two-layered structure which is constituted of a transparentconductive film (for example, ITO film) formed on the same layer as thefirst portion 1 a of the electrode 1X, and a conductive metal film whichis formed on the transparent conductive film and exhibits a resistancevalue smaller than a resistance value of the transparent conductivefilm.

The touch panel 20 includes a shield conductor 3 as shown in FIG. 1 toFIG. 5. The shield conductor 3 is arranged on the viewer-side surface(main surface) of the substrate 11, and is covered with the insulationfilm 12 formed over the shield conductor 3.

The shield conductor 3 is formed on the same layer as the first portions1 a of the electrodes 1X, and is formed using a material which exhibitshigh transmissivity, for example, a transparent conductive material suchas ITO (Indium Tin oxide). The first portions 1 a of the plurality ofelectrodes 1X and the shield conductor 3 are formed by patterning thesame conductive film.

As viewed in a plan view, the shield conductor 3 is arranged in thecenter region of the touch panel 20 such that the shield conductor 3covers the plurality of electrodes (electrodes 1X, electrodes 2Y). Asshown in FIG. 3 to FIG. 5, the shield conductor 3 has a plurality ofopening portions 4. The plurality of opening portions 4 include openingportions 4 a where the first portions 1 a of the electrodes 1X arearranged in openings, and opening portions 1 b where the first portions1 a of the electrodes 1X are not arranged in the openings. The firstportions 1 a of the electrodes 1X are formed within the opening portions4 a of the shield conductor 3. That is, the shield conductor 3 of thisembodiment 1 are formed in a separated manner from the first portions 1a of the electrodes 1X and on the same conductive layer as the firstportions 1 a of the electrodes 1X.

In this embodiment 1, the shield conductor 3 has a meshed shape and isconstituted of, for example, a plurality of members 3 a whichrespectively extend in the third direction and are arranged parallel toeach other in the fourth direction orthogonal to the third direction atpredetermined pitches, and a plurality of members 3 b which respectivelyextend in the fourth direction which intersects with the third directionand are arranged parallel to each other in the third direction atpredetermined pitches. The opening portions 4 a and the opening portions4 b are respectively openings which are formed by the members 3 a andthe members 3 b arranged in a meshed shape.

In this embodiment 1, with respect to planar shapes of the secondportions (1 b, 2 b) of the respective electrodes 1X and 1Y, as shown inFIG. 1 and FIG. 2, the second portions (1 b, 2 b) of the electrodes 1Xand 1Y have a square shape where the widths of these second portions (1b, 2 b) are set larger than widths of the first portions (1 a, 2 a) ofthe electrodes 1X and 1Y, for example. The second portion 1 b of theelectrode 1X and the second portion 2 b of the electrode 2Y are arrangedin a state where a side of the second portion 1 b and a side of thesecond portion 2 b which face each other make an acute angle withrespect to the above-mentioned first direction (for example, Xdirection) (an inclined state). Accordingly, as shown in FIG. 5, theshield conductor 3 has a meshed shape where one member 3 a and the othermember 3 b are arranged along the sides of the second portion 1 b of theelectrode 1X and the sides of the second portion 2 b of the electrode 2Ywhich face each other in an opposed manner respectively. The secondportion 1 b of the electrode 1X and the second portion 2 b of theelectrode 2Y are arranged in a state where the side of the secondportion 1 b and the side of the second portion 2 b which face each otherin an opposed manner make an angle of 45 degrees, for example, withrespect to the first direction (X direction) (inclined state). Onemember 3 a which constitutes the mesh shape extends at an angle of 45degrees in the clockwise direction with respect to the first direction(X direction), for example, and the other member 3 b which constitutesthe mesh shape extends at an angle of 45 degrees in the counterclockwisedirection with respect to the first direction (X direction), forexample.

In this embodiment 1, the shield conductor 3 adopts the shape where onepiece of one member 3 a and one piece of the other member 3 b whichconstitute the meshed shape are arranged between the first portions 1 aof two electrodes 1X arranged adjacent to each other, that is, the shapewhere one member 3 a and the other member 3 b which constitute themeshed shape traverse between the first portions 1 a of the twoelectrodes 1X arranged adjacent to each other.

The touch panel 20 of this embodiment 1 is arranged on the liquidcrystal display panel 30 such that a surface of the substrate 11opposite to the viewer-side surface of the substrate 11 faces aviewer-side surface of the liquid crystal display panel 30 in an opposedmanner. The shield conductor 3 is arranged between the liquid crystaldisplay panel 30 and the center region of the touch panel 20 where theplurality of electrodes (electrodes 1X, electrodes 2Y) are arranged. Apredetermined signal is inputted to the shield conductor 3 so thatnoises transmitted to the touch panel 20 from the liquid crystal displaypanel 30 can be reduced. The shield conductor 3 of this embodiment 1 iselectrically connected to a line whose potential is fixed to a referencepotential (for example, 0V), for example, out of power source potentialsused in the display device with a touch panel.

The touch panel 20 includes a shield conductor 6 in addition to theshield conductor 3 as shown in FIG. 1 to FIG. 4. The shield conductor 6is arranged on the insulation film 12, and is covered with theprotective film 13 formed over the shield conductor 6.

The shield conductor 6 is formed on the same layer as the secondportions 1 b of the electrodes 1X and the electrodes 2Y, and is formedusing a material which exhibits high transmissivity, for example, atransparent conductive material such as ITO (indium Tin oxide). Thesecond portions 1 b of the plurality of electrodes 1X, the plurality ofelectrodes 2Y and the shield conductor 6 are formed by patterning thesame conductive film.

The shield conductor 6 is, as viewed in a plan view, arranged in theperipheral region of the touch panel 20 such that the shield conductor 6covers the plurality of lines 5. The shield conductor 6 is formed in aseparated manner from the second portions 1 b of the electrodes 1X andthe electrodes 2Y and on the same conductive layer as the secondportions 1 b of the electrodes 1X and the electrodes 2Y.

A predetermined signal is inputted to the shield conductor 6 so thatnoises transmitted to the touch panel 20 from the viewer's side can bereduced. The shield conductor 6 of this embodiment 1 is electricallyconnected to a line whose potential is fixed to a reference potential(for example, 0V), for example, out of power source potentials used inthe display device with a touch panel.

FIG. 6 schematically shows a state where capacitances C1, C3 aregenerated between a finger 50 of a viewer and the electrodes 1X, and acapacitance C2 is generated between the finger 50 of the viewer and theelectrode 2Y. The touch panel 20 of this embodiment detects thecapacitance difference of coupled capacitance between the electrode 1Xand the electrode 2Y, and detects touch position coordinates in a touchplane of the touch panel 20 which the finger 50 of the viewer touches.

Next, a manufacturing method of the touch panel 20 of this embodiment 1is explained in conjunction with FIG. 1 to FIG. 5.

Firstly, a first transparent conductive film made of a transparentconductive material (for example, ITO) is formed on a viewer-sidesurface of the substrate 11.

Next, on the first transparent conductive film, a first mask which hasan electrode pattern, a shield conductor pattern and a wiring pattern isformed using a positive resist, for example. Thereafter, by etching thefirst transparent conductive film using the first mask as an etchingmask, the first portions 1 a of the electrodes 1X, the shield conductor3 and a wiring lower-layer pattern are formed on the substrate 11. Theshield conductor 3 is configured to have a plurality of opening portions4 including the opening portions 4 a where the first portions 1 a of theelectrodes 1X are formed within the opening portions and a plurality ofopening portions 4 b where the first portions 1 a of the electrodes 1Xare not formed within the opening portions. The first portions 1 a ofthe electrodes 1X are formed in the opening portions 4 of the shieldconductor 3.

Next, the first mask is removed and, thereafter, on the above-mentionedwiring lower-layer pattern, a wiring upper-layer pattern made of aconductive metal material, for example, is selectively formed. Due tosuch steps, the lines 5 each having the two-layered structure consistingof the wiring lower-layer pattern and the wiring upper-layer pattern areformed.

Next, the insulation film 12 made of a negative resist, for example, isformed on the substrate 11 including an area on the shield conductor 3,areas on the first portions 1 a of the electrodes 1X, and areas on thelines 5. In such a step, the shield conductor 3, the first portions 1 aof the electrodes 1X, and the lines 5 are covered with the insulationfilm 12.

Next, the contact holes 12 a and the contact holes 12 b are formed inportions of the insulation film 12 in place and, thereafter, a secondtransparent conductive film made of a transparent conductive material(for example, ITO) is formed on the insulation film 12 including theinside of the contact holes 12 a and the inside of the contact holes 12b.

Next, on the second transparent conductive film, a second mask which hasan electrode pattern and a shield conductor pattern is formed using apositive resist, for example. Thereafter, by etching the secondtransparent conductive film using the second mask as an etching mask,the second portions 1 b of the electrodes 1X, the electrodes 2Y and theshield conductor 6 are formed on the insulation film 12. In this step,the second portions 1 b which are formed on the upper layer areelectrically and mechanically connected to the first portions 1 a whichare formed on the lower layer via contact holes 12 a. Further, the firstportions 1 a which are formed on the lower layer intersect with thefirst portions 2 a of the electrodes 2Y which are formed on the upperlayer. Further, the electrodes 1X and the electrodes 2Y have respectiveterminal ends thereof electrically and mechanically connected to thecorresponding lines 5 which are formed on the lower layer via thecontact holes 12 b.

Next, the second mask is removed and, thereafter, the protective film 13made of a negative resist, for example, is formed on the insulation film12 including an area on the second portions 1 b of the electrodes 1X, anarea on the electrodes 2Y and an area on the shield conductor 6 thusproviding the structure shown in FIG. 1 to FIG. 5. In this step, thesecond portions 1 b of the electrodes 1X, the electrodes 2Y and theshield conductor 6 are covered with the protective film 13.

In the conventional electrostatic-capacitance-coupling touch panel, asshown in FIG. 16 to FIG. 18, a plurality of electrodes 1X and aplurality of electrodes 2Y are formed on conductive layers (lower layerand upper layer) different from each other by way of the insulation film12. In such electrode structure, with respect to the insulation film 12and the protective film 13 which is formed on the electrodes 1X formedon the insulation film 12, strain is generated in these films due to theelectrode 1X formed on the upper layer. Further, with respect to areflection light, the lower layer and the upper layer have the differentoptical path lengths and hence, the color difference occurs between theelectrodes 2Y formed on the lower layer and the electrodes 1X formed onthe upper layer thus making electrode patterns of the electrodes 1X andthe electrodes 2Y appear conspicuously.

To the contrary, in the electrostatic-capacitance-coupling touch panel20 of this embodiment, as shown in FIG. 1 to FIG. 4, the electrode 1Xincludes the first portions 1 a which are formed on the layer differentfrom the second electrode 2Y in a state where the first portions of theelectrode 1X intersect with the electrode 2Y, and the second portions 1b of the electrode 1X which are formed on the same layer as theelectrode 2Y and are formed in a separated manner from the electrode 2Y.Further, the first portions 1 a are connected to the second portions 1 bvia the contact holes 12 a formed in the insulation film 12 between thefirst portions 1 a and the electrodes 2Y.

In such electrode structure, it is possible to impart a uniform filmforming surface to the protective film 13 and hence, it is possible tosuppress the occurrence of strain in the protective film 13 thussuppressing the conspicuous appearance of the electrode patterngenerated by the color difference attributed to strain in the protectivefilm 13. As a result, worsening of the optical characteristic attributedto the conspicuous appearance of the electrode pattern can be suppressedthus suppressing lowering of characteristics of a display device inwhich the touch panel 20 is assembled.

Further, by minimizing portions where the color difference occurs, thatis, by restricting the portions where the color difference occurs toonly the first portions 1 a of the electrodes 1X, the conspicuousappearance of the electrode pattern generated due to the colordifference caused by the optical path difference can also be suppressed.As a result, worsening of the optical characteristic attributed to theconspicuous appearance of the electrode pattern can be suppressed thussuppressing the lowering of characteristics of a display device in whichthe touch panel 20 is assembled.

Further, in the conventional electrostatic-capacitance-coupling touchpanel, as shown in FIG. 17 and FIG. 18, a shield conductor 15 is formedon a surface of a substrate 11 opposite to a viewer-side surface. Insuch structure, as transparent conductive material layers, it isnecessary to provide three transparent conductive material layersconsisting of the transparent conductive material layer for forming theelectrodes 1X, the transparent conductive material layer for forming theelectrodes 2Y and, further, the transparent conductive material layerfor forming the shield conductor 15. This structure becomes a factorwhich impedes the reduction of cost.

To the contrary, according to the electrostatic-capacitance-couplingtouch panel 20 of this embodiment, as shown in FIG. 1 to FIG. 5, theshield conductor 3 is formed of the transparent conductive film formedon the same layer as the first portions 1 a of the electrodes 1X.Further, the shield conductor 3 includes the opening portions 4 a inregions where the first portions 1 a of the electrodes 1X are formed,and the first portions 1 a of the electrodes 1X are formed in theopening portions 4 a formed in the shield conductor 3.

Due to such electrode structure, the electrodes 1X, the electrodes 2Yand the shield conductor 3 which is provided for reducing noisestransmitted from the liquid crystal display panel 30 to the touch panel20 can be formed of two transparent conductive material layers.Accordingly, compared to the conventional touch panel, materials andprocesses for forming the transparent conductive material layers can besaved and hence, it is possible to manufacture the touch panel at alower cost. Due to the lowering of the manufacturing cost of the touchpanel, a cost for manufacturing the display device with a touch panel inwhich the touch panel is incorporated can be lowered.

Further, the touch panel 20 of this embodiment 1 includes, as shown inFIG. 1 to FIG. 4, the shield conductor 6 which is formed on theinsulation film 12 so as to cover the plurality of lines 5 and to whicha predetermined signal is inputted. In this embodiment, 0V is inputtedto the shield conductor. A kind of signal to be inputted to theconductor used for shielding does not limit the gist of the presentinvention and other kinds of signals may be used. The shield conductor 6is formed on the same transparent conductive layer as the first portions1 a of the electrodes 1X and the electrodes 2Y. Due to such structure,it is possible to reduce noises transmitted to the touch panel from theviewer's side by the shield conductor 6. Further, the electrodes 1X, theelectrodes 2Y and the shield conductor 6 provided for reducing noisestransmitted to the touch panel from the viewer's side can be formed oftwo transparent conductive material layers and hence, the touch panelcan be manufactured at a low cost.

As described above, by providing the shield conductor 3 between thesubstrate 11 and the electrodes 1X and the electrodes 2Y, it is possibleto reduce noises transmitted to the touch panel 20 from the liquidcrystal display panel 30. However, a distance between the electrodes 1Xand the electrodes 2Y and the shield conductor 3 is only approximatelyseveral μm and hence, capacitance is generated between the electrode 1Xand the electrode 2Y and the shield conductor 3. This capacitanceadversely effects an operation of the electrostatic-capacitance-couplingtouch panel and hence, it is desirable to reduce the capacitance to aminimum value.

In view of the above, the shield conductor 3 of this embodiment 1includes the opening portions 4 a where the first portions 1 a of theelectrodes 1X are formed in the openings thereof. Further, in additionto these opening portions 4 a, the shield conductor 3 of this embodiment1 also includes opening portions 4 b where the first portions 1 a of theelectrodes 1X are not formed in the openings thereof. Due to suchconductor structure, the capacitance generated between the electrode 1Xand the electrode 2Y and the shield conductor 3 can be reduced thusproviding the highly reliable display device with a touch panel whichexhibits the excellent noise resistance at a low cost.

The capacitance generated between the electrodes 1X and the electrodes2Y and the shield conductor 3 is decreased along with the increase ofthe number and size of the opening portions 4 b where the first portion1 a of the electrode 1X is not formed in the opening, that is, alongwith the increase of a non-conductive region per unit area. However, atrade-off relationship is established between the capacitance generatedbetween the electrodes 1X and the electrodes 2Y and the shield conductor3 and a shielding effect. Accordingly, it is desirable to decide thenumber and size of the opening portions 4 b by taking a shielding effectinto consideration. The number and size of the opening portions 4 b canbe defined by the number of one members and the other members (3 a, 3 b)constituting a meshed shape which traverse between the first portions 1a of two electrodes 1X arranged adjacent to each other (the number ofone members and the other members (3 a, 3 b) constituting the meshedshape which are arranged between the first portions 1 a of twoelectrodes 1X arranged adjacent to each other). Accordingly, it isdesirable to form the shield conductor 3 in a meshed shape where, asshown in the embodiment 1, at least one piece of one member and at leastone piece of the other member (3 a, 3 b) intersect with each otherbetween the first portions 1 a of two electrodes 1X arranged adjacent toeach other (in a meshed shape where at least one piece of one member andat least one piece of the other member (3 a, 3 b) which intersect witheach other are arranged between the first portions 1 a of two electrodes1X arranged adjacent to each other).

FIG. 7 is a cross-sectional view showing the cross-sectional structureof a touch panel according to a modification of the embodiment 1 of thepresent invention.

The touch panel 20 according to this modification basically has thesubstantially same constitution as the above-mentioned embodiment 1 anddiffers from the embodiment 1 with respect to the followingconstitution.

That is, as shown in FIG. 7, the touch panel 20 of this modificationincludes a front panel 14 which is formed on a protective film 13. Thetouch panel 20 having such constitution can also acquire thesubstantially equal advantageous effects as the above-mentionedembodiment 1.

Embodiment 2

FIG. 8 to FIG. 12 are views showing a display device with a touch panelaccording to the embodiment 2 of the present invention. That is, FIG. 8is a plan view showing an electrode pattern of a touch panel which isincorporated into a display device with a touch panel according to theembodiment 2 of the present invention. FIG. 9 is a plan view showing aportion of the display device with a touch panel shown in FIG. 8 in anenlarged manner. FIG. 10A to FIG. 10B are views showing thecross-sectional structure of the touch panel shown in FIG. 8, whereinFIG. 10A is a cross-sectional view taken along a line D-D′ in FIG. 8,and FIG. 10B is a cross-sectional view showing a portion of the touchpanel shown in FIG. 8A in an enlarged manner. FIG. 11A to FIG. 11B areviews showing the cross-sectional structure of the touch panel shown inFIG. 8, wherein FIG. 11A is a cross-sectional view taken along a lineE-E′ in FIG. 8, and FIG. 11B is a cross-sectional view showing a portionof the touch panel shown in FIG. 8A in an enlarged manner. FIG. 12 is ablock diagram showing the schematic constitution of the display devicewith a touch panel according to the embodiment 2 of the presentinvention.

The display device with a touch panel according to the embodiment 2basically has the substantially same constitution as the above-mentionedembodiment 1 and differs from the embodiment 1 with respect to thefollowing constitution.

That is, in the above-mentioned embodiment 1, as shown in FIG. 1 to FIG.4, the explanation has been made with respect to the example where thefirst portions 1 a of the electrodes 1X and the shield conductor 3 areformed on the conductive layer which constitutes the lower layer, andthe second portions 1 b of the electrodes 1X, the electrodes 2Y and theshield conductor 6 are formed on the conductive layer formed above thesecomponents. In this embodiment 2, as shown in FIG. 8 to FIG. 11, thesecond portions 1 b of the electrodes 1X and the electrodes 2Y (2 a, 2b) are formed on the conductive layer which constitutes the lower layer,and the first portions 1 a of the electrodes 1X and the shield conductor3 are formed on the conductive layer formed above these components.

The second portions 1 b of the plurality of respective electrodes 1X,the plurality of electrodes 2Y and the plurality of lines 5 are formedon a main surface of the substrate 1, and these components are coveredwith an insulation film 12 formed above these components. The firstportions 1 a of the plurality of respective electrodes 1X and the shieldconductor 3 are formed on the insulation film 12 and are covered with aprotective film 13 formed above these components.

The first portions 1 a (upper layer in this embodiment) of theelectrodes 1X intersect with the first portions 2 a of the electrodes 2Yin plane. The first portions 1 a of the electrodes 1X are electricallyand mechanically connected to two second portions 1 b (lower layer inthis embodiment) arranged adjacent to each other with the first portions2 a sandwiched therebetween via the contact holes 12 a formed in theinsulation film 12 respectively. Here, the insulation film 12constitutes an interlayer insulation film formed between the firstportions 1 a of the electrodes 1X and the electrodes 2Y.

The shield conductor 3 is formed in a center region and a peripheralregion of the touch panel 20 such that the shield conductor 3 covers thesecond portions 1 b of the plurality of respective electrodes 1X, theplurality of electrodes 2Y and the plurality of lines 5.

As shown in FIG. 12, the touch panel 20 of this embodiment 2 is arrangedon the liquid crystal display panel 30 in a state where aprotective-film-13-side surface of the substrate 11 face a viewer-sidesurface of the liquid crystal display panel 30, and the shield conductor3 is arranged between the liquid crystal display panel 30 and the centerregion and the peripheral region of the touch panel 20. A predeterminedsignal is inputted to the shield conductor 3 so as to reduce noisestransmitted to the touch panel 20 from the liquid crystal display panel30.

Also in this embodiment 2, the conspicuous appearance of the electrodepattern generated due to the color difference caused by strain in theprotective film 13 and the conspicuous appearance of the electrodepattern generated due to the color difference caused by optical pathdifference can be suppressed. As a result, worsening of the opticalcharacteristic attributed to the conspicuous appearance of the electrodepattern can be suppressed thus suppressing the lowering ofcharacteristics of a display device in which the touch panel 20 isassembled.

Further, the electrodes 1X, the electrodes 2Y and the shield conductor 3which reduces noises from the liquid crystal display panel 30 to thetouch panel 20 can be formed of two transparent conductive materiallayers. Accordingly, compared to the conventional touch panel, materialsand processes for forming the transparent conductive material layers canbe saved and hence, it is possible to manufacture the touch panel at alower cost. Due to the lowering of the manufacturing cost of the touchpanel, a cost for manufacturing the display device with a touch panel inwhich the touch panel is incorporated can be lowered.

The shield conductor 3 of the embodiment 2 also includes the openingportions 4 a where the first portions 1 a of the electrodes 1X areformed in the openings thereof in the same manner as the above-mentionedembodiment 1. Further, in addition to these opening portions 4 a, theshield conductor 3 of this embodiment 2 also includes opening portions 4b where the first portions 1 a of the electrodes 1X are not formed inthe openings thereof. Also in this embodiment 2, in the same manner asthe above-mentioned embodiment 1, the capacitance generated between theelectrode 1X and the electrode 2Y and the shield conductor 3 can bereduced thus providing the highly reliable display device with a touchpanel which exhibits the excellent noise resistance at a low cost.

Embodiment 3

FIG. 13 and FIG. 14 are views showing a touch panel incorporated into adisplay device with a touch panel according to the embodiment 3 of thepresent invention. FIG. 13 is a plan view showing an electrode patternof the touch panel, and FIG. 14 is a plan view showing a shieldconductor pattern in the touch panel shown in FIG. 13.

The display device with a touch panel according to the embodiment 3basically has the substantially same constitution as the above-mentionedembodiment 1 and differs from the embodiment 1 with respect to theconstitution of a shield conductor 3.

That is, the shield conductor 3 used in the above-mentioned embodiment 1is formed in a meshed shape where one piece of one member 3 a and onepiece of the other member 3 b which intersect with each other traversebetween the first portions 1 a of two electrodes 1X arranged adjacent toeach other.

On the other hand, the shield conductor 3 used in this embodiment 3 is,as shown in FIG. 13 and FIG. 14, formed in a meshed shape where twopieces of one members 3 a and two pieces of the other members 3 b whichintersect with each other traverse between the first portions 1 a of twoelectrodes 1X arranged adjacent to each other. In this embodiment 3, awidth of each of one member and the other member (3 a, 3 b) is set toapproximately 20 μm, for example, while a width of each of the openingportion 4 a and the opening portion 4 b is set to approximately 200 μm,for example.

In this manner, the embodiment 3 which includes the shield conductor 3can also acquire the substantially equal advantageous effect as theabove-mentioned embodiment 1.

It is needless to say that the meshed-pattern shape of the shieldconductor 3 in this embodiment 3 is also applicable to theabove-mentioned modification 1 of the embodiment 1 and theabove-mentioned embodiment 2.

Embodiment 4

FIG. 15 is a plan view showing a shield conductor pattern of a touchpanel which is incorporated into a display device with a touch panelaccording to an embodiment 4 of the present invention.

The display device with a touch panel according to the embodiment 4basically has the substantially same constitution as the above-mentionedembodiment 1 and differs from the embodiment 1 with respect to theconstitution of a shield conductor 3.

That is, the shield conductor 3 used in the above-mentioned embodiment 1is formed in a meshed shape where one member 3 a and the other member 3b which intersect with each other traverse between the first portions 1a of two electrodes 1X arranged adjacent to each other.

On the other hand, the shield conductor 3 used in this embodiment 4 is,as shown in FIG. 15, not formed in a meshed shape, but is formed in apattern where a plurality of opening portions 4 a and a plurality ofopening portions 4 b are simply arranged in a spotted manner.

In this manner, the embodiment 4 which includes the shield conductor 3can also acquire the substantially equal advantageous effect as theabove-mentioned embodiment 1.

It is needless to say that the pattern shape of the shield conductor 3in this embodiment 4 is also applicable to the above-mentionedmodification of the embodiment 1 and the above-mentioned embodiment 2.

In the above-mentioned embodiments (1, 2, 3, 4) and the modification,the explanation has been made with respect to the example where thefirst portions 1 a and the second portions 1 b of the electrodes 1X areformed of different conductive layers respectively. It is needless tosay, however, that the present invention includes a case where the firstportions 2 a and the second portions 2 b of the electrodes 2Y are formedof different conductive layers respectively.

In the above-mentioned embodiments (1, 2, 3, 4) and the modification,the explanation has been made with respect to the display device with atouch panel which includes the touch panel on the liquid crystal displaypanel as an example of the display panel. However, the present inventionis not limited to such a display device, and the present invention isapplicable to a display device with a touch panel which includes a touchpanel on other display panel such as an organic EL display panel or aninorganic EL display panel.

Although the invention made by the inventors of the present inventionhas been specifically explained in conjunction with the embodiments, itis needless to say that the present invention is not limited to theabove-mentioned embodiments, and various modifications and variationsare conceivable without departing from the gist of the presentinvention.

1. A display device with a touch panel comprising: a display panel; andan electrostatic-capacitance-coupling touch panel which is arranged on aviewer-side surface of the display panel, wherein the touch panelincludes: a substrate; a first shield conductor which is formed on theviewer-side surface of the substrate; an insulation film which is formedon the first shield conductor; a plurality of first electrodes which areformed on the insulation film, extend in a first direction and arearranged parallel to each other in a second direction which intersectswith the first direction; and a plurality of second electrodes which areformed on the insulation film, extend in the second direction and arearranged parallel to each other in the first direction which intersectswith the second direction, wherein a predetermined signal is inputted tothe first shield conductor, each one of the plurality of firstelectrodes includes a first portion which is formed on the viewer-sidesurface of the substrate and the second portion which is formed in aseparated manner from the second electrode on the insulation film, thefirst portion is connected to the second portion via a contact holeformed in the insulation film, the first shield conductor has aplurality of opening portions, the plurality of opening portions includefirst opening portions in which the first portions are formed inopenings and second opening portions in which the first portions are notformed in the openings, and the first portions are formed in the firstopening portions.
 2. A display device with a touch panel according toclaim 1, wherein the first shield conductor has a meshed shapeconstituted of first members and second members which intersect witheach other, and the first opening portions and the second openingportions are respectively opening portions which are formed by the firstmembers and the second members which constitute the meshed shape.
 3. Adisplay device with a touch panel according to claim 2, wherein thesecond electrode has first portions which intersect with the firstportions of the first electrode in plane and second portions which arecontiguously formed with the first portions, the second portion of thefirst electrode has a planar square shape in which a width of the secondportion of the first electrode is larger than a width of the firstportion of the first electrode, the second portion of the secondelectrode has a planar square shape in which a width of the secondportion of the second electrode is larger than a width of the firstportion of the second electrode, the second portion of the firstelectrode and the second portion of the second electrode are arranged ina state where a side of the second portion of the first electrode and aside of the second portion of the second electrode which face each otherin an opposed manner make an acute angle with respect to the firstdirection, and the first member and the second member of the firstshield conductor which constitute the meshed shape are formed along theside of the second portion of the first electrode and the side of thesecond portion of the second electrode which face each other in anopposed manner.
 4. A display device with a touch panel according toclaim 3, wherein at least one of the first members and at least one ofthe second members of the first shield conductor which constitute themeshed shape are arranged between the first portions of two firstelectrodes arranged adjacent to each other.
 5. A display device with atouch panel according to claim 1, wherein the display device furtherincludes a plurality of lines which are formed around a region where theplurality of first electrodes and the plurality of second electrodes areformed, and are electrically connected to the plurality of firstelectrodes or the plurality of second electrodes respectively, theplurality of lines are formed on the viewer-side surface of thesubstrate, and the display device further includes a second shieldconductor which is formed on the insulation film so as to cover theplurality of lines, and to which a predetermined signal is inputted. 6.A display device with a touch panel according to claim 5, wherein thetouch panel further includes a protective film which is formed on theplurality of first electrodes and the plurality of second electrodes. 7.A display device with a touch panel according to claim 6, wherein thetouch panel has a front panel formed on the protective film.
 8. Adisplay device with a touch panel according to claim 1, wherein theplurality of first electrodes and the plurality of second electrodes areformed of a transparent conductive film.